https://bugs.kde.org/show_bug.cgi?id=514062

            Bug ID: 514062
           Summary: Caps Lock LED indicator does not turn on
    Classification: Applications
           Product: systemsettings
      Version First 6.5.4
       Reported In:
          Platform: Arch Linux
                OS: Linux
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: kcm_keyboard
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected], [email protected],
                    [email protected]
  Target Milestone: ---

SUMMARY

Caps Lock LED indicator does not turn on with a proprietary keyboard under KDE
Plasma/Wayland.


STEPS TO REPRODUCE

Keyboard used: Logitech MX Keys

Registered in kcm_keyboard as
Model: Generic | Generic 105-key PC
Num Lock on startup: Turn on
Key repeat [v] Delay 600ms Rate: 25 repeats/s.
Layout: French


OBSERVED RESULT

Issue: the caps lock LED does not turn on when the key is pressed. It works in
TTY/console mode though. But it does not work under KDE Plasma 6.5.4/Wayland
(and prior versions).

Unstable workaround: 
kbd_mode -f -u reinstates the LED but such a command tampers with KDE Plasma
which ends up crashing.


Tested alternatives:
I explorer the 'Key Bindings' section but did not identify any setting.


EXPECTED RESULT

Caps Lock LED shall be turned on when enabled


SOFTWARE/OS VERSIONS

OS: Arch Linux (fully updated on 2026-01-02)  
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.21.0
Qt Version: 6.10.1


ADDITIONAL INFORMATION
n/a

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